The Robert Clack Technical School opened in 1955 and was named after the former Mayor of the borough of Dagenham who died in 1953.

In September 2015 it was revealed that Barking and Dagenham London Borough Council were considering asking Robert Clack School to significantly expand to accommodate 2,500 pupils, which would make the Robert Clack the biggest secondary school in England.

This site adjoins the lower school site, and is reached through pathways through the sports fields [2] A number of notable people have attended the school including: In 2016 three pupils from Robert Clack represented the United Kingdom in a world debating championship held in Japan.

[5] In 2007, Charles, Prince of Wales (later King Charles III) visited Robert Clack School, 13 years later in March 2020 his daughter-in-law, Meghan, Duchess of Sussex visited Robert Clack and delivered a speech marking International Women's day.

This was the Duchess’ last solo engagement as a working royal before stepping back in late March 2020.